[dia] (11 commits) Non-fast-forward update to branch zbrown/graphene-rect

[Zander Brown <zbrown src gnome org>]

The branch 'zbrown/graphene-rect' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  491f022... general: store bounding and extent boxes as graphene_rect_t

Commits added to the branch:

  6fc56c8... win32: ensure pygobject is available in CI (*)
  a0fb646... win32: use the right package name (*)
  9b39004... general: store bounding and extent boxes as graphene_rect_t
  5df6dd5... vdx: style updates, fix most warnings
  ed218a6... general: assorted cleanups
  763a981... vdx: silence the final warnings
  811a16e... message: move dia_message_filename and stop declaring it tw
  c4d3251... general: fix prototypes
  ca445a1... general: add missing annotations
  a94a9f9... general: fixup various warnings
  bd73a5d... build: add some more cflags

(*) This commit already existed in another branch; no separate mail sent